Abstract: The present invention relates to a method for the preparation of phenols, in which an aryldiazonium salt, which is prepared by the diazotisation of a corresponding aromatic, primary amine, is decomposed by heating in a mixture containing hot water, a mineral acid and an organic solvent, wherein the organic solvent contains a ketone of formula (I) R1C(O)R2 in which R1 and R2 independently stand for (C1-C5)-alkyl and R1 and R2 together have at least four carbon atoms, wherein the aromatic primary amine is aniline or a substituted aniline, which contains at least one further substituent which is selected from: alkyl, alkenyl, alkynyl, halogen, haloalkyl, cycloalkyl, heteroaryl, carboxyl, cyan, alkoxyl and ester, and wherein substantially no copper salts are contained in the mixture.

Abstract: The present invention relates to a method for the preparation of phenols, in which an aryldiazonium salt, which is prepared by the diazotisation of a corresponding aromatic, primary amine, is decomposed by heating in a mixture containing hot water, a mineral acid and an organic solvent, wherein the organic solvent contains a ketone of formula (I) R1C(O)R2 in which R1 and R2 independently stand for (C1-C5)-alkyl and R1 and R2 together have at least four carbon atoms, wherein the aromatic primary amine is aniline or a substituted aniline, which contains at least one further substituent which is selected from: alkyl, alkenyl, alkynyl, halogen, haloalkyl, cycloalkyl, heteroaryl, carboxyl, cyan, alkoxyl and ester, and wherein substantially no copper salts are contained in the mixture.

Abstract: The invention relates to mixtures containing 5 to 99.5 wt. % of a compound of formula (I), 95 to 0.5 wt. % of a compound of formula (II) and a maximum of 10 wt. % of one of several compounds of general formula (III a), wherein A1-A32 which are independent from each other are equal or different and represent a straight-chained or branched alkyl or alkenyl having 1-12 carbon atoms, cycloalkyl having 48 carbon atoms, an aryl having 6-12 carbon atoms, an aralkyl having 7-12 carbon atoms, or A1-A2, A3-A4, A5-A6 etc. -A31-A32 which are independent from each other and are equal or different and are connected together directly or via O or N-A33 to a ring having 3-7 ring members, A33 represents an alkyl having 1-4 carbon atoms.

Abstract: New bromoepoxy-cyclohexenes and their derivatives, which are starting compounds for units used to synthesize natural compounds, e.g. cyclitols or aminocyclitols.

Abstract: The manufacture of pure isomeric 1,4-dibromo-epoxy-cyclohexenes and their derivatives, which are starting compounds for units used to synthesize neutral compounds, e.g. cyclitols or aminocyclitols.

Abstract: The reaction product obtained from cis-benzenetrioxide, hydrazine and phthalic anhydride, and its manufacture. The compounds are intermediates for stereospecific syntheses of aminocyclitols.